On a more serious note, to the people who can't seem to understand why zombies are popular:

Zombies, you see, stand in for regular humans in certain scenarios. Why do you think the zombie phenomenon is always set in (even the cause of) a post-apocalytpic setting? What's really being discussed/fantasized about is a complete breakdown in social order, during which time other human beings will be the primary threat to your survival. But it's a hell of a lot more polite and comforting to couch it in terms of zombies because then hey, it's all just a fun fiction! Zombies can't be real, so no, I'm not talking about killing people!

I'm not a sociologist, but my take on why the zombie theme is increasingly popular is that it's closely tied to the increasing political and ideological polarization amongst americans. There's certainly a "we gotta band together, take care of our own!" narrative in any post-apocalytpic setting, which dovetails perfectly with people's politics. A virulent disease that causes the infected to become a mindless horde, causing the downfall of society and posing a threat to your way of life and very survival is the perfect analog for how each side would describe the other in our inflamed political rhetoric. And as a bonus, they're already dead so we don't have to feel bad about killing them!

There are any number of reasons why you might find it objectionable, or simply be bored with it, but nobody should be confused about why it's so popular.